-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
HazelcastClient.java
114 lines (98 loc) · 3.54 KB
/
HazelcastClient.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.coreedge.discovery;
import java.util.Set;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.HazelcastInstanceNotActiveException;
import com.hazelcast.core.Member;
import org.neo4j.coreedge.server.AdvertisedSocketAddress;
import org.neo4j.coreedge.server.BoltAddress;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
import org.neo4j.logging.Log;
import org.neo4j.logging.LogProvider;
import static java.util.Collections.emptySet;
import static java.util.stream.Collectors.toSet;
import static org.neo4j.coreedge.discovery.HazelcastClusterTopology.EDGE_SERVERS;
class HazelcastClient extends LifecycleAdapter implements EdgeTopologyService
{
private final Log log;
private HazelcastConnector connector;
private HazelcastInstance hazelcastInstance;
HazelcastClient( HazelcastConnector connector, LogProvider logProvider )
{
this.connector = connector;
log = logProvider.getLog( getClass() );
}
@Override
public ClusterTopology currentTopology()
{
Set<Member> coreMembers = emptySet();
boolean attemptedConnection = false;
while ( coreMembers.isEmpty() && !attemptedConnection )
{
if ( hazelcastInstance == null )
{
try
{
attemptedConnection = true;
hazelcastInstance = connector.connectToHazelcast();
}
catch ( IllegalStateException e )
{
log.info( "Unable to connect to core cluster" );
break;
}
}
try
{
coreMembers = hazelcastInstance.getCluster().getMembers();
}
catch ( HazelcastInstanceNotActiveException e )
{
hazelcastInstance = null;
}
}
Set<BoltAddress> edgeMembers = edgeMembers( hazelcastInstance );
return new HazelcastClusterTopology( coreMembers, edgeMembers );
}
public static Set<BoltAddress> edgeMembers( HazelcastInstance hazelcastInstance )
{
if ( hazelcastInstance == null )
{
return emptySet();
}
return hazelcastInstance.<String>getSet( EDGE_SERVERS ).stream()
.map( hostnamePort -> new BoltAddress( new AdvertisedSocketAddress( hostnamePort ) ) )
.collect( toSet() );
}
@Override
public void stop() throws Throwable
{
if ( hazelcastInstance != null )
{
hazelcastInstance.shutdown();
}
}
@Override
public void registerEdgeServer( AdvertisedSocketAddress address )
{
hazelcastInstance.getSet( EDGE_SERVERS ).add( address.toString() );
}
}